| details |
Late Cambrian |
|
USSR(Baltic) |
Volkova,N.A. Acritarchs of the Middle and Upper Cambrian on the Northwestern East European Platform. (In: Stratigraphy and Correlation of Sediments Using Palynology Methods. Materials IV All-Union Palynological Conference. G.N.Papulov, editor) |
1983 |
| details |
Tremadocian |
|
United Kingdom |
Downie,C. Acritarchs in British stratigraphy |
1984 |
| details |
Early Tremadocian |
|
Morocco |
Elaouad-Debbaj,Z. Tremadoc acritarchs and chitinozoa from the Middle Anti-Atlas, (Morocco). |
1988 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Volkova,N.A. et al. Distribution of acritarchs in the Cambrian - Ordovician boundary Beds of the Suhkrumagi section (North Estonia). |
1988 |
| details |
Late Tremadocian |
Early Arenigian |
England(Lancashire) |
Molyneux,S.G. et al. The age of the Watch Hill Grits, (Ordovician), English Lake District; Structural and palaeogeographical implications. |
1988 |
| details |
Late Tremadocian |
Early Arenigian |
Wales(Carmarthenshire) |
Molyneux,S.G. et al. Acritarchs dating of Latest Tremadoc - Earliest Arenig (Early Ordovician) sediments in the Carmarthen District, South Wales. |
1989 |
| details |
Tremadocian |
|
Estonia |
Volkova,N.A. Acritarchs from the Cambrian-Ordovician boundary sediments of northern Estonia |
1989 |
| details |
Late Cambrian |
Early Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Acritarchs of the Desposits of the Cambrian-Ordovician boundary northern Estonia |
1989 |
| details |
Late Cambrian |
Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Middle and Upper Cambrian acritarchs in the East-European Platform |
1990 |
| details |
Late Cambrian |
Tremadocian |
USSR(Yaroslav) |
Volkova,N.A. Middle and Upper Cambrian acritarchs in the East-European Platform |
1990 |
| details |
Late Cambrian |
|
USSR(Estonian SSR) |
Kheinsalu,K. et al. Cambrian-Ordovician boundary beds in the Saka Ii section, Northern East Estonia. |
1990 |
| details |
Tremadocian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Cambrian |
Tremadocian |
Belgium |
Herbosch,A. et al. Study of the lithostratigraphic, biostratigraphic and sedimentology of the Lessines borehole (Southern Boarder of the Brabant Massive, Belgium) |
1991 |
| details |
Tremadocian |
|
Belgium |
Vanguestaine,M. Acritarch datation of the deepest Cambro-Tremadocian strata of the Lessines borehole (Southern Border of the Brabant Massif, Belgium) |
1991 |
| details |
Early Arenigian |
|
Argentina(Jujuy) |
Ottone,E.G. et al. Lower Ordovician palynomorphs from the Acoite Formation, Northwestern Argentina. |
1992 |
| details |
Late Cambrian |
Early Ordovician |
Nd |
Martin,F. Acritarchs: A review |
1993 |
| details |
Tremadocian |
|
Argentina(Salta) |
Rubinstein,C.V. Palynological investigations in the Lower Paleozoic of Argentina |
1993 |